CN103173712A - Preparation method of high-infrared-emittance heat dissipation coating - Google Patents
Preparation method of high-infrared-emittance heat dissipation coating Download PDFInfo
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- CN103173712A CN103173712A CN2011104339923A CN201110433992A CN103173712A CN 103173712 A CN103173712 A CN 103173712A CN 2011104339923 A CN2011104339923 A CN 2011104339923A CN 201110433992 A CN201110433992 A CN 201110433992A CN 103173712 A CN103173712 A CN 103173712A
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Abstract
The invention relates to a preparation method of a high-infrared-emittance heat dissipation coating, which mainly solves the technical problem of short product service life due to poor heat dissipation and the technical problem of potential safety hazard due to temperature increase in the existing electronic device. The main component of the heat dissipation coating is Mn-Cr-Ti-Cu complex oxides, and the oxide powder can be subjected to plasma spray on a matrix surface to prepare the high-infrared-emittance coating. The coating powder is composed of one or more of the following oxides: 5-47% of MnO2, 37-70% of Cr2O3, 5-12% of CuO and 11-25% of TiO2. The prepared high-infrared-emittance heat dissipation coating material has the advantages of high infrared emittance, favorable heat dissipation and high bonding strength with the matrix, can effectively lower the temperature in electronic instruments and enhance the reliability of electronic equipment, and is applicable to the fields of electronic measuring instruments, computer room equipment, measurement and control systems, aircrafts, arms of precision and the like. The coating material also has the advantages of compact structure, light weight, high bonding property and high shock and vibration resistance; and the technique is practical and suitable for industrial production.
Description
Technical field
The present invention relates to a kind of preparation method of the coating of dispelling the heat, particularly the preparation method of a kind of high infrared radiation of and matrix excellent bonding performance heat radiation coating, belong to special coating preparation and applied technical field.
Background technology
Along with the development of science and technology, electronics, computer and household electrical appliance emerging in multitude and extensively universal, the Highgrade integration of electron device, high capacity have more and more seriously influenced the safe handling of circuit.Particularly along with the prolongation of working hour, because causing temperature, device heating raises, temperature rises and causes that easily the electron device working temperature raises, accurate control electron device precise decreasing or unstable, and then also affects the accurate controllability of whole instrument.Also due to the accurate requirement of electron device, be enclosed in during major part in the housing environment of sealing, heat-dissipating space is limited, can't adopt auxiliary heat dissipation means such as adding ventilation, water-cooled, therefore need research closed heat system from the heat elimination and cooling method, to guarantee the reliable and stable work of product.The heat of enclosure interior is transferred on housing with the form of ir radiation usually, for the heat energy of guaranteeing to absorb is effectively arranged loose in surrounding environment, housing outer surface can spray the heat-radiation coating layer material with higher infrared emittance, the matrix internal heat is lost to surrounding environment with the ir radiation form, effectively reduces the temperature of enclosure interior.
High IR emittance heat radiation coating can effectively reduce the temperature in electronic machine, improve the reliability of electronics, be widely used in a plurality of fields such as electronic measuring instrument, computer room equipment, TT﹠C system, aircraft, arms of precision, particularly can satisfy microminiaturization, the reliability of accurate military equipment heat is arranged defeated requirement.
Summary of the invention
The objective of the invention is for above-mentioned the deficiencies in the prior art, and the preparation method who provides a kind of high infrared radiation to dispel the heat coating.The method has mainly solved existing electron device because heat radiation is bad, and causes the technical barrier of the product short potential safety hazard that rising brings with Yin Wendu in work-ing life.
For achieving the above object, the present invention adopts following technical proposals: a kind of preparation method of high infrared radiation heat radiation coating, its heat radiation coating main component is Mn-Cr-Ti-Cu system multivariant oxide, and the method with this system oxide powder by plasma spraying prepares high IR emittance coating at matrix surface.This coating powder composition is one or more of following oxide compound, and its shared molar ratio is as follows: MnO
25-47%; Cr
2O
337-70%; CuO 5-12%; TiO
211-25%.Be analytical pure with the purity requirement of selected raw material, granularity requirements evenly and be submicron order can obtain the powder of steady quality, excellent property like this.The purity of all raw materials is at least more than 99%.
According to above-mentioned high infrared radiation heat radiation coating, technique of the present invention comprises the following steps:
A. taking raw material by component proportion, is solvent with ethanol, and ball milling 1-4 hour, then oven dry, put into alumina crucible, at 1000-1150 ℃ of lower pre-burning 1-24 hour, to reduce specific surface.After the ball milling oven dry, calcining is 0.5-6 hour under 1200-1350 ℃, slowly is down to room temperature and prepares powder again.
B. the powder for preparing is added slurrying after organic binder bond, dispersion agent and the appropriate amount of deionized water such as PVA, adopt the method for mist projection granulating to make the approximately powder of 40-60 μ m of spherical in shape, good fluidity, granularity.
C. surface treatment directly affects film base binding performance, and use properties and reliability.Must carry out surface treatment to base material before spraying, at first adopt mechanical polishing method that substrate surface is polished, then carry out sandblast, make cleaning surfaces and suitable roughness is arranged, increase the actual bonded area between rete and substrate, improve the bonding force between rete and substrate.
D. plasma spraying intermediate layer, to increase the bonding strength of coating, this transition layer adopts the nickel alclad Ni-Al powder of particle diameter 40-60 μ m, is sprayed on the housing substrate.
E. adopt plasma spraying high infrared radiation Mn-Cr-Ti-Cu series oxide coating, speed of relative movement of strictly controlling spray power, spray distance and angle of spray, spray gun and workpiece etc. affects the parameter of coating performance.The thickness of spraying must be evenly simultaneously, and thickness is 20-150 μ m, and the too thick weight that can affect product too thinly can affect radiation effect.
According to above-mentioned high infrared radiation heat radiation coating, the body material of this patent can be the metals such as stainless steel, iron, copper, aluminium, can be also the materials such as pottery, glass.
The high infrared radiation heat-radiation coating layer material that the present invention is prepared has high infrared emittance and good heat dispersion, and is high and high hardness arranged with substrate combinating strength.Can effectively reduce the temperature in electronic machine, improve the reliability of electronics, be applicable to a plurality of fields such as electronic measuring instrument, computer room equipment, TT﹠C system, aircraft, arms of precision.This coated material compact construction, quality is light, adhesive property is high, and is shock-resistant and vibration resistance is strong, and this technique is practical, is suitable for suitability for industrialized production.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these to implement only to be used for explanation the present invention and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
In embodiment 1-5, body material is aluminium alloy, prepares in the above the thick high emissivity ir radiation heat radiation coating of 100 μ m.Wherein the composition of high infrared radiation heat radiation coating powder is listed table 1 in, and the purity requirement of selected raw material is analytical pure, granularity requirements evenly and be submicron order, the purity of all raw materials is at least more than 99%.
Taking raw material by component proportion, is solvent with ethanol, ball milling 4 hours, and then oven dry, put into alumina crucible, 1050 ℃ of lower pre-burnings 24 hours.After the ball milling oven dry, calcining is 6 hours under 1300 ℃, slowly is down to room temperature again.
The powder for preparing is added slurrying after organic binder bond, dispersion agent and the appropriate amount of deionized water such as PVA, adopt the method for mist projection granulating to make the approximately powder of 40-60 μ m of spherical in shape, good fluidity, granularity.
Base material is carried out surface treatment, at first adopt mechanical polishing method that substrate surface is polished, then carry out sandblast, spray subsequently nickel alclad Ni-Al powder intermediate layer, to increase the bonding strength of coating.Adopt at last plasma spraying high infrared radiation Mn-Cr-Ti-Cu series oxide coating, spraying current is that 550A, voltage are 60V, and the powder feeding rate is 30gmin
-1
Control at last the thickness of coating by spray time, the infrared emittance that detects coating is 0.91.
The composition of table 1 high infrared radiation heat radiation coating powder
| Oxide compound | Composition range | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| MnO 2 | 5-47 | 15 | 33 | 40 | 5 | 47 |
| Cr 2O 3 | 37-70 | 54 | 46 | 42 | 70 | 37 |
| TiO 2 | 5-12 | 6 | 8 | 6 | 12 | 5 |
| CuO | 11-25 | 25 | 13 | 12 | 13 | 11 |
Claims (9)
1. the preparation method of high infrared radiation heat radiation coating, its heat radiation coating main component is Mn-Cr-Ti-Cu system multivariant oxide, method with this system oxide powder by plasma spraying prepares high IR emittance coating at matrix surface, this coating powder composition is one or more of following oxide compound, and its shared molar ratio is as follows: MnO
25-47%, Cr
2O
337-70%, CuO 5-12%, TiO
211-25% is analytical pure with the purity requirement of selected raw material, granularity requirements evenly and be submicron order, the purity of all raw materials is at least more than 99%.
2. the preparation method of a kind of high infrared radiation heat radiation coating as claimed in claim 1, its method comprises following processing step:
A. taking raw material by component proportion, is solvent with ethanol, ball milling 1-4 hour, and then oven dry, put into alumina crucible, at 1000-1150 ℃ of lower pre-burning 1-24 hour, to reduce specific surface, after the ball milling oven dry, calcining is 0.5-6 hour under 1200-1350 ℃, slowly is down to room temperature and prepares powder again;
B. the powder for preparing is added slurrying after PVA, organic binder bond, dispersion agent and appropriate amount of deionized water, adopt the method for mist projection granulating to make the approximately powder of 40-60 μ m of spherical in shape, good fluidity, granularity;
C., must carry out surface treatment to matrix before spraying, at first adopt mechanical polishing method that substrate surface is polished, carry out again sandblast, make cleaning surfaces and suitable roughness is arranged, increase the actual bonded area between rete and substrate, improve the bonding force between rete and substrate;
D. plasma spraying intermediate layer, to increase the bonding strength of coating, this transition layer adopts the nickel alclad Ni-Al powder of particle diameter 40-60 μ m, is sprayed on the housing substrate;
E. adopt plasma spraying high infrared radiation Mn-Cr-Ti-Cu series oxide coating, the strict speed of relative movement of controlling spray power, spray distance and angle of spray, spray gun and workpiece etc. affects the parameter of coating performance, the thickness of spraying must be even simultaneously, and thickness is 20-150 μ m.
3. the preparation method of a kind of high infrared radiation heat radiation coating as claimed in claim 2, the body material that wherein relates to adopts stainless steel, iron, copper, aluminium and pottery, glass material.
4. the preparation method of a kind of high infrared radiation heat radiation coating as claimed in claim 1 or 2, its concrete steps: (1) body material adopts aluminium alloy, prepare in the above the thick high emissivity ir radiation heat radiation coating of 100 μ m, wherein the purity requirement of the selected raw material of high infrared radiation heat-radiation coating composition of layer is analytical pure, granularity requirements evenly and be submicron order takes raw material by component proportion; (2) be solvent with ethanol, ball milling 4 hours, then oven dry, put into alumina crucible, and 1050 ℃ of lower pre-burnings 24 hours, after the ball milling oven dry, calcining was 6 hours under 1300 ℃, slowly is down to room temperature again; (3) powder for preparing is added slurrying after PVA, organic binder bond, dispersion agent and appropriate amount of deionized water, adopt the method for mist projection granulating to make the approximately powder of 40-60 μ m of spherical in shape, good fluidity, granularity; (4) base material is carried out surface treatment, at first adopt mechanical polishing method that substrate surface is polished, carry out again sandblast, spray subsequently nickel alclad Ni-Al powder intermediate layer, to increase the bonding strength of coating, adopt at last plasma spraying high infrared radiation Mn-Cr-Ti-Cu series oxide coating, spraying current is that 550A, voltage are 60V, and the powder feeding rate is 30gmin
-1(5) control at last the thickness of coating by spray time, the infrared emittance that detects coating is 0.91.
5. the preparation method of a kind of high infrared radiation heat radiation coating as claimed in claim 4, the shared molar ratio of its described high infrared radiation heat-radiation coating composition of layer, oxide M nO
215, Cr
2O
354, TiO
26, CuO25.
6. the preparation method of a kind of high infrared radiation heat radiation coating as claimed in claim 4, the shared molar ratio of its described high infrared radiation heat-radiation coating composition of layer, oxide M nO
233, Cr
2O
346, TiO
28, CuO13.
7. the preparation method of a kind of high infrared radiation heat radiation coating as claimed in claim 4, the shared molar ratio of its described high infrared radiation heat-radiation coating composition of layer, oxide M nO
240, Cr
2O
342, TiO
26, CuO12.
8. the preparation method of a kind of high infrared radiation heat radiation coating as claimed in claim 4, the shared molar ratio of its described high infrared radiation heat-radiation coating composition of layer, oxide M nO
25, Cr
2O
370, TiO
212, CuO13.
9. the preparation method of a kind of high infrared radiation heat radiation coating as claimed in claim 4, the shared molar ratio of its described high infrared radiation heat-radiation coating composition of layer, oxide M nO
247, Cr
2O
337, TiO
25, CuO11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110433992.3A CN103173712B (en) | 2011-12-22 | 2011-12-22 | A kind of preparation method of high infrared radiation thermal dispersant coatings |
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|---|---|---|---|
| CN201110433992.3A CN103173712B (en) | 2011-12-22 | 2011-12-22 | A kind of preparation method of high infrared radiation thermal dispersant coatings |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451526A (en) * | 2014-11-17 | 2015-03-25 | 北京理工大学 | Preparation method of high-emissivity ceramic coating |
| CN106189562A (en) * | 2016-07-28 | 2016-12-07 | 杭州吉华高分子材料股份有限公司 | A kind of infra-red radiation heat radiation aqueous wear-resistant unsticky coating and preparation method thereof |
| CN107638061A (en) * | 2016-07-21 | 2018-01-30 | 佛山市顺德区美的电热电器制造有限公司 | Pan and electric cooker and the preparation method of pan with it |
| CN108928062A (en) * | 2018-05-07 | 2018-12-04 | 佛山职业技术学院 | A kind of heat loss through radiation composite aluminum substrate and preparation method thereof |
| CN109397786A (en) * | 2018-10-10 | 2019-03-01 | 广东昭信照明科技有限公司 | A kind of heat loss through radiation can be around folding metallic aluminium base composite ceramic substrate and preparation method thereof |
| CN110106466A (en) * | 2019-04-28 | 2019-08-09 | 北京工业大学 | Ultra-thin heat dissipation film of one kind and its preparation method and application |
| CN110769529A (en) * | 2019-11-12 | 2020-02-07 | 中国商用飞机有限责任公司 | Electric heating film structure and forming method of electric heating film |
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| CN1205352A (en) * | 1998-07-14 | 1999-01-20 | 钱家荣 | Polycrystalline thermally-excitable radiation coating and method of use |
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2011
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Patent Citations (1)
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|---|---|---|---|---|
| CN1205352A (en) * | 1998-07-14 | 1999-01-20 | 钱家荣 | Polycrystalline thermally-excitable radiation coating and method of use |
Non-Patent Citations (1)
| Title |
|---|
| 叶菲: ""高温红外陶瓷涂层的制备与性能研究"", 《万方数据库》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451526A (en) * | 2014-11-17 | 2015-03-25 | 北京理工大学 | Preparation method of high-emissivity ceramic coating |
| CN104451526B (en) * | 2014-11-17 | 2017-01-25 | 北京理工大学 | Preparation method of high-emissivity ceramic coating |
| CN107638061A (en) * | 2016-07-21 | 2018-01-30 | 佛山市顺德区美的电热电器制造有限公司 | Pan and electric cooker and the preparation method of pan with it |
| CN106189562A (en) * | 2016-07-28 | 2016-12-07 | 杭州吉华高分子材料股份有限公司 | A kind of infra-red radiation heat radiation aqueous wear-resistant unsticky coating and preparation method thereof |
| CN106189562B (en) * | 2016-07-28 | 2019-05-10 | 杭州吉华高分子材料股份有限公司 | Aqueous wear-resistant unsticky coating of a kind of infra-red radiation heat dissipation and preparation method thereof |
| CN108928062A (en) * | 2018-05-07 | 2018-12-04 | 佛山职业技术学院 | A kind of heat loss through radiation composite aluminum substrate and preparation method thereof |
| CN109397786A (en) * | 2018-10-10 | 2019-03-01 | 广东昭信照明科技有限公司 | A kind of heat loss through radiation can be around folding metallic aluminium base composite ceramic substrate and preparation method thereof |
| CN110106466A (en) * | 2019-04-28 | 2019-08-09 | 北京工业大学 | Ultra-thin heat dissipation film of one kind and its preparation method and application |
| CN110769529A (en) * | 2019-11-12 | 2020-02-07 | 中国商用飞机有限责任公司 | Electric heating film structure and forming method of electric heating film |
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| CN103173712B (en) | 2015-09-02 |
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